Negretti & Zambra - London. Brass Weather Forecaster

Attractive and practical brass Weather Forecaster in mint condition, including original canvas carrying case. [4.75in / 120mm diameter]. The instrument comprises three independently rotating rings, enabling data including seasons, wind directions and barometer readings to be computed, revealing one of 62 possible forecasts. The inner disc engraved “Negretti & Zambra London” and “Patent 6276 1915”. The renowned firm of Negretti & Zambra was undoubtedly the World leading meteorological instrument maker of the latter 19th Century and early 20th.